Chinese scholars have developed "super elastic" hard carbon materials by imitating spider webs
Publisher: Administrator Date：2019-09-27
Carbon is one of the most widely distributed materials on the planet. Recently, the research group of Professor Yu Shuhong of the University of Science and Technology of China was inspired by the spider web in nature to develop a "superelastic" hard carbon material with a bullet velocity of 0.86 meters per second and a "squashing" of 100,000 times without deformation. Simple and efficient. The academic journal "Advanced Materials" in the field of international materials science has published the research results.
According to reports, according to the arrangement of carbon atoms, carbon materials can be divided into three types: graphite carbon, soft carbon and hard carbon. For example, the main component of the pencil lead is graphite carbon, and the common coal is a composite of soft carbon and hard carbon. Graphite carbon and soft carbon have high elasticity and are easily deformed, but have low strength; the structure of hard carbon is stable, but brittle and brittle. How to make hard carbon maintain "hardness" and become more flexible is a major challenge in the material science community.
Recently, Prof. Yu Shuhong's research group was inspired by spider webs in nature. By constructing a nanofiber network structure by template method, a new hard carbon material with nanofiber network structure was prepared, which has the advantages of superelasticity, fatigue resistance and stability. .
“Like a spider web, the internal structure of this material is a cross-welding between the wires, which is similar to a 'wool group'.” Qin Bing, a doctoral student at the University of Science and Technology, said that this structural design gives the material new properties. The experiment shows that the rebound speed is 0.86 meters per second; the "squashing" is 100,000 times, and the shape and performance are almost restored; in the low temperature environment of minus 196 degrees Celsius, the superelasticity and resistance stability can be maintained.